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  Oscillating Catalytic CO Oxidation on a Platinum Field Emitter Tip: Determination of a Reactive Phase Diagram by Field Electron Microscopy

Lim, Y.-S., Berdau, M., Naschitzki, M., Ehsasi, M., & Block, J. H. (1994). Oscillating Catalytic CO Oxidation on a Platinum Field Emitter Tip: Determination of a Reactive Phase Diagram by Field Electron Microscopy. Journal of Catalysis, 149(2), 292-299. doi:10.1006/jcat.1994.1297.

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 Creators:
Lim, Yong-Sung1, Author           
Berdau, Martin1, Author           
Naschitzki, Matthias1, Author           
Ehsasi, Mohammad1, Author           
Block, Jochen H.1, Author           
Affiliations:
1Fritz Haber Institute, Max Planck Society, ou_24021              

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 Abstract: A [111]-oriented Pt field emitter tip is used to study bistability and oscillations of CO oxidation by field electron microscopy (FEM) under low-pressure conditions (pO2 = 4 × 10−4 Torr, pCO = 8 × 10−8 to 4 × 10−5 Torr) in the temperature range 240 to 450 K. A kinetic phase diagram can be established, obtained on an FEM level with ≍2 nm lateral resolution. Below T ≍ 300 K a region of bistability prevails, and above T ≍ 300 K an oscillatory regime is obtained, thus yielding a cross-shaped phase diagram. These phenomena are surface plane specific and visible at the {011} planes of Pt and their surroundings.

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Language(s): eng - English
 Dates: 1994-10
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1006/jcat.1994.1297
 Degree: -

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Title: Journal of Catalysis
  Abbreviation : J. Catal.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: 8 Volume / Issue: 149 (2) Sequence Number: - Start / End Page: 292 - 299 Identifier: ISSN: 0021-9517
CoNE: https://pure.mpg.de/cone/journals/resource/954922645027